Click on map to open large map in new window (Map updated: 11 August 2009)

Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.The map is generated through the NBN Gateway using their Interactive Mapping Tool.

This rare, foliose lichen is very similar to P. norvegica (described elsewhere), but differs in the C- medulla and the smooth, upper surface of the lobes (they are ridged in P. norvegica). It has marginal, pale grey, farinose soralia. By contrast P. lacerata has cylindrical isidia. In Ireland, it is known from Counties Kerry and Kilkenny but was previously more widespread. It grows on shaded, mossy trees in old woodlands and on large boulders in or near upland tarns and loughs.